Antiskibdibtgr



A. W. TWEEDEN.

ANIISKIDDING BRAKE. APPLICATION FILED IULY9. l9l8.

1,323,934. Patented Dec. 2,1919.

artisan eraras Parana arren.

l AJSTJ-DREW WITW EEDHZN OF urnco vra,.wasmnsro v..

.ANTISKIDDIN fBRAKE Bmkes=;--and 1 do'hereby declarethe follows ingto be awfully lear, and exact .deseriptionr. of theiinvention, such as -.-w.1lll1enable others; skilled :i

gthe art itolwhich .it appertains. to. make an usethe -sames This invention .relatesftovehicles-,. and? more particularly to: brakecmeehamsm forwheeled i vehicles. 3 I

It isoneofi theiobjectswof ithfifplllisgnbilll. vention to provide a means which will opcrate to preventJ the for w archand lateral skidding; of vehicles, such for instance as automobiles. It is a further ob ect of the invention to provide a simple, substantial,

easily operated and comparatively inexpensive form of brake mechanism which can be-quickly controlled at the will of the vehicle operator or driver, so as to be thrown into braking position when necessary, and which can be readily lifted by the operator to aposition clear of the roadway when the device is out of use. Another object of the invention is to provide a device of this type which can be connected to vehiclesof different types of construction without any substantial changes in the construction of the vehicle and without expensive attachments or machining or other variations in the standard construction.

lVith the above objects in view the invention consists in the construction, the combination, and in details and arrangements of the parts as more fully described hereinafter relative to the embodiment .of the invention, illustrated in the accompanying drawing, in which,-

Figure 1 is a rear end elevation ofthe rear wheel and axle, and frame showing the device as applied and in braking position;

Fig. 2 is an elevation of the detached axle;

Fig. 3 is a transverse section through the axle and a member of the frame;

Fig. 4 is a similar View howing the brake in elevated position;

Fig. 5 is an underneath plan view of the shoe showing the arms of the frame broken away. i

As above -.suggested, the device may be applicable to vehicle structures of various Specification inf Lettersjatentl Bateisted-DeQ-Z,i919. a ie nmefiisdimly-9, 1918'. semrne. sesame;

types-andfin.ithez-present' instanceit is de- Y signed: to :be: attached tor: avehicle having I an: axle structure 2 andra :frau1e 3,1thelatter Q ofifwhich. ISq-PPOXHClGd mathiscase with a transverse, fixedr'part t; The-"device comprises essentiallyta 1shoei5 in the form: here shown: of air oblon blockofsuitable roportions, and which :may 1 beef cast iron or othercanaterial,{ the. lower face i of" which is roughenedi as bytk'nobs and at ea-ch end .there' is provided ianeai onl'ug 7 which is riveted oraotherwiise suitably connected to the. .vertical. fiangesofiangle irons or arms" S to.therupperv end of each of which there 1s -.sl1own i as v riveted or OtllGlWJSG suitably secured as at 9 anform of bearing'prefe'rably of the split ring type illustrated at 10,"the sections being pivoted at 11 diametrically opposite to the fastening means 9 so that the sectional bearing ring 10 can be closed about its pivot v11 and then the opposed ends are secured together as at 9. Preferably the arms converge from the bearing rings 10 which embrace the outer portions of the axle 2 downwardly to a position substantially vertically below the medial vertical plane, longitudinally of the vehicle frame so thatv the shoe 5 when in the position shown in Figs. 1 and 3 assumes a position vertically below the center of the axle. To facilitate the raising and lowering of the shoe by the swinging of the frame formed by the arms 8, one form of controlling means is illustrated as comprising a pair of cables 15-15 each of which is connected at 16 to the forward sideof the shoe 5 which latter is clearly shown in Fig. 3 as having its bottom face curved as at 5 substantially concentric to the axes of the axle 2. The cables 15 are extended upwardly over suitable guide pulleys 17 whichare mounted on thelower face of the fixed member from which the cables 15 extend forwardly to any suitable form of operating means such for instance as a suitably operated drum or segment not necessary to be here shown, and bywhich the cables 15 can be secured to hold the brake frame in the posi be of rubber or other suitable cushioning material. 7

It is desirable able yielding or resilient stop or. abutment device or cushion is provided, and ,as here.

illustrated comprises a pair of bumpers or collars -23,one of which is secured on each lifting rope 15, these being adapted to move rearwardly against springsv24 supported on the face of the transverse fixed member f .of or on the frame. The action will be such that when the operator releases the lifting cables l5'the brake will rapidly drop to contact positionwith the ground or roadway surface due to the action of gravity on the shoe and the strut arms, and as the brake engages the roadway surface the bumpers 23- engage therespeetive springs 24 and these act as cushioning means soas to cause the gradual application and reaction of the brake. v

that when the bra-lie is: lowered to a position vertically below the axle 2 thevehicleand the brake elements are protected against the sudden shocks engen .dered by the contacting of the shoe with" the roadway surface; and to that end a suit.

From the above it will 'beseen the- 7' forwar v momentum or skidding tendency of the veh "clewillbe materially retarded when the brake is lowered to operativev position,

similarly'the laterally skidding of the vehicle will be retarded. H V

Iii- What is claimed is: I 7, The combination-with a'vehiele; having v V frame whose parallel sides are connected by across-piece, and 1a. Wheeled axle'onkwhich the frame is mounted; of a brake-blocker Shoe disposed beneath the'center 'ofitheiaxle,

upwardly and outwardly inclined arms connected to the-block andflpivotedto swing on an "axleto carry the block forwardly,- guide pulleys mounted on 1 the clower -sildeiof the, i cross-piece, anda-a pair of Control; ropes r ANDREWW T EEDENI I" 

